back up, cesspit, canals, downspout, carry, airlock, watercourse, cutoff, blockage, clog.
At the culvert
he drew rein, faced about, and stood gazing upon Widewood's hills.
Barty looked rather solemnly at the little, solid, stone- arched bridge, and the stone- walled culvert.
One week her special task was to superintend the boys in putting a culvert
into the new road to carry off the rain in the wet season.